Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ The Downstream Infrastructure Impacts of Design Vehicle Selection https://rip.trb.org/View/2558437 Tue, 27 May 2025 16:11:18 GMT https://rip.trb.org/View/2558437 Anchorage Zone Reinforcement for Post-Tensioned Concrete Girders https://rip.trb.org/View/2448854 Mon, 04 Nov 2024 15:55:14 GMT https://rip.trb.org/View/2448854 Synthesis of Hydrologic Approaches to Playa Lakes, Areas of Significant Karst Geology, and Arid Regions https://rip.trb.org/View/2256325 Wed, 27 Sep 2023 16:36:47 GMT https://rip.trb.org/View/2256325 Performance Testing of GRS Test Piers Constructed with Florida Aggregates - Axial Load Deformation Relationships https://rip.trb.org/View/2199641 Wed, 21 Jun 2023 11:47:01 GMT https://rip.trb.org/View/2199641 Training Manual for SDDOT’s LRFD Shallow Foundation Design Method https://rip.trb.org/View/2023146 Thu, 15 Sep 2022 10:04:51 GMT https://rip.trb.org/View/2023146 A Direct Design Method of Hybrid High Strength Steel Web Tapered Members https://rip.trb.org/View/1890628 Mon, 08 Nov 2021 15:05:34 GMT https://rip.trb.org/View/1890628 Develop Countermeasure Strategies for Protecting Bridge Girders Against Overheight Vehicles Impact https://rip.trb.org/View/1867130 Mon, 19 Jul 2021 21:15:30 GMT https://rip.trb.org/View/1867130 RES2020-25: Development of a New Attenuation Model for West Tennessee https://rip.trb.org/View/1717012 Mon, 29 Jun 2020 18:12:33 GMT https://rip.trb.org/View/1717012 Development of Structural Design Guide for Ultra High Performance Concrete https://rip.trb.org/View/1467626 Mon, 22 May 2017 09:27:19 GMT https://rip.trb.org/View/1467626 Geotechnical Design Manual https://rip.trb.org/View/1427336 Mon, 24 Oct 2016 12:37:59 GMT https://rip.trb.org/View/1427336 CCTRP 17-01: Development of a Simplified Design Method and Reinforcement Detail for the Acute Corner of Skewed Bridge Decks https://rip.trb.org/View/1422701 Thu, 08 Sep 2016 15:14:28 GMT https://rip.trb.org/View/1422701 Update of the AASHTO LRFD Movable Highway Bridge Design Specifications https://rip.trb.org/View/1407093 Wed, 11 May 2016 14:54:44 GMT https://rip.trb.org/View/1407093 SEISMIC: Development of Improved Procedures for Seismic Design of Earth Retaining Structures on Conventional and Pile Foundations https://rip.trb.org/View/1234314 Thu, 03 Jan 2013 15:10:21 GMT https://rip.trb.org/View/1234314